Mill



May 8, 1923. 1,454,493

A. SUNDH ET AL MILL Original Filed Oct. 8, 1920 5 Sheets-Sheet 1 A TTORNE m.

May 8, 1923. 1,454,493

A. SUNDH ET AL MILL Original Filed Oct. 8 1920 5 Sheets-Sheet 2 11v VENTURE/- A TTORNE Y5- May '8, 1923. I

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1,454,493 A. SUNDH ET AL MILL 5 Sheets-Sheet 5 Original Filed Oct. 8, 1920 INVENTORS" a9 ATTORNEY/5' May 8, 1923. 1,454,493

A. SUNDH ET AL MILL 5 Sheets-Shet 4 Original Filed Oct. 8, 1920 g "mum,

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A. SUNDH ET AL MILL 5 Sheets-Sheet 5 Original Filed Oct. 8, 1920 IIIHI lilll.

Patented May 8, 1923.

UNITED STATES 1,454,493 PATENT OFFICE.

AUGUST SUNDH, OF HASTINGS-UPON-HUDSON, NEW YORK, AND WILLIAM WESTEBMAN, OF DETROIT, MICHIGAN.

MILL.

Original application filed October 8, 1920, Serial No. 415,513. Divided and this application filed December 24, 1921.

To all whom it may concern:

Be it known that we, AUGUST SUNDH, a citizen of the United States, and a resident of Hastings-upon-Hudson, county of Westchester, and State of New York, and WIL- LIAM WESTERMAN, a citizen of the United States, and a resident of Detroit, county of lVayne, and State of Michi n, have invented certain new and useful mprovements in Mills, of which the following is a specification.

This invention relates to a device adapted to be applied to mills for indicating the travel of some moving part of the mill, the

device being arranged so as also to indicate or register the amount of material passed through the mill. The device is also adapted to be connected to a recording instrument in an office for example, such as faces the manager may observe the conditions at the mill from his desk.

An object of the invention is to provide a device of this character indicated wherein one indicating device is driven directly from I the mill itself while the other is controlled electrically by contact mechanism adapted to be actuated by bodily movement of a moving part of the mill to which the device is applied.

In the accompanying drawings wherein we have illustrated an embodiment of our invention and wherein the device has been shown applied to a rolling mill by way of illustration only,

Fig. 1 illustrates in elevation and more or less diagrammatically the device of our invention applied to a rolling mill with indicating devices at the mill and in an ofiice 0 remote from the mill;

Fig. 2 shows in front elevation the machine at the left of Fig.1;

Fig. 3 is an end elevation of the machine of Fig. 2;

Fig. 4 is an enlarged view of the contact mechanism and actuating means therefor employed in our device;

Figs. 5 and 6 are sections taken substantially on the lines 5-5 and 6-6 respectively of Fig. 4; I

Fig. 7 is an enlarged, elevational view of the mechanism employed in connection with a clock which is used with the device where of a plant whereby he- Serial no. 524,621.

it is desired to register conditions at the mill at a remote point;

Fig. 8 is a sectional view taken on the line 88 of Fig. 7;

Fig. 9 shows on an enlarged scale and in sectional elevation a device employed in the present invention whereby a chart is applied showing the amount of material which has passed through the mill at any given instant, this chart arrangement being connected to a time piece;

Fig. 10 is a section 10-10 of Fig. -9; and

Fig. 11 is a wiring diagram illustrating the circuits for the various electrical devices em loyed.

eferring now to the drawings in detail and first of all to Fig. 1, A indicates in general a rolling mill with our improved device applied thereto while B designates the indicating devices connected with a time piece and which devices are adapted to register at a remote point conditions at the mill A.

Referring to the other figures in detail, 1 and 2 designate respectively the upper and lower rolls of a rolling mill to which our device is applied, these rolls being mounted for rotation in frames 3 and 4. The rolls 1 and 2 may be driven in any suitable manner. 5 designates a roll of metal which is to be passed between the rolls 1 and 2 of the rolling mill A, the roll of metal being supported on suitable brackets 6 secured to the frame of the machine or any other convenient location. The upper roll 1 of the rolling mill is adjustable in the usual man ner by means of screws 7. The roll 2 of the mill is provided with a shaft 8 carrying a bevelled gear 9, the latter being in constant mesh with a corresponding gear 10 mounted upon the end of a vertically extending shaft 11 which is guided by a bracket 12, the latter being secured to the side frame 4 of the machine. The shaft 11 is secured to a vertically extending stub shaft 13, the latter carrying at its u per end a bevelled gear 14 (see Fig. 4). is gear is contained within a suitable casing 15 which is secured to the side frame 4 of the machine in any suitable manner, this casing being entirely enclosed, preferably, with the exception of the spaces which are provided for the indicating elements 16 and 17 taken on the line The gear 14 meshes with a bevelled gear 18 mounted upon a shaft 19, the latter being mounted for rotation in a bearing or bearings 20 within the casing 15 already referred to. The shaft 19 carries at its inner end one member 21 of an electrically operated cone-clutch 22. Also carried by the shaft 19 is a spur gear 23, this gear meshing with a s )ur gear 24 mounted upon the end of a sha t 25 having a hearing at 26 in the casing 15, the shaft 25 constituting an operating shaft for the indicating element 16. The element 16, it may here be mentioned, is rovided for the purpose of registering or indicating the peripheral travel of the mill roll 2. The shaft 25 carries adjacent its inner end a commutator or circuit controlling device 27 cooperating with contacts 28 and 29 as will hereinafter be more fully pointed out.

The clutch 22 already referred to, comprises the member 21 carried by the stub shaft 19 and a member 30 carried by .a shaft 31 which when rotated causes the indicating element 17 to function, the member 30 having a sliding movement longitudinally of said shaft. This sliding motion is imparted to the member 30 by energization of a winding 32 with which the clutch is provided, the control for this winding being described in detail hereinafter. The shaft 31 also carries collector rings 33 and 34 cooperating with contacts 35 and 36. A commutator 37 is also mounted upon this shaft, this commutator cooperating with contacts 38 and 39.

From the description thus far given it will be seen that the indicating element 16 is capable of being driven directly from the roll 2 of the mill A through the gear train comprising the gears 8, 10, 14, 18, 23 and 24 while the indicating element 17 is driven through the gear train comprising gears 9, 10, 14, 18 and the clutch 22. The indicators designated as a whole B (see Fig. 1) are shown in detail in Figs. 7 and 8 and will now be described.

The upper indicating element is designated 40 and the lower indicating element is designated 41, these. two elements corresponding to the indicating elements 16 and 17 respectively, that is to say, the reading of the indicating element 40 is the same as that of the indicating element 16 while the reading of the indicating element 41 is the same as that of the indicating element 17. The indicating element 40 is driven or actuated b an electro-magnet designated 42 (see Fig. 8; the circuit of this magnet being con trolled in a manner hereinafter to be pointed out in detail. This magnet is provided with a core 43 secured to a lever 44 mounted upon a shaft 45 extending longitudinally of the indicating element 40, the member 44 being provided with a. pawl 46 cooperating with a ratchet-wheel 47 which constitutes the operating or actuating means for the indicator.

It will be seen that as the magnet 42 is energized and draws in its core 43 the ratchet-wheel 47 will be given a partial rotation in an anti-clockwise direction as viewed in Fig. 8.

The operating mechanism for the indicating device 41 comprises a magnet 48 provided with a core 49 connected to an arm 50 extending longitudinally of the indicating element, the arm 50 carrying or having connected to it a pawl 51 cooperating with a ratchet-wheel 52 constituting the operating or actuating mechanism for the indicating element. The operation of this arrangement is obvious, the energization of the magnet 48 causing the core 49 to be drawn inwardly whereby the pawl 51 will cause a partial rotation of the ratchet-wheel 52 in an anticlockwise direction. All of this mechanism just described, is mounted within a casing 53 provided, of course, with suitable reading openings. The casing 53 has mounted therein and secured thereto in any suitable manner a time piece 56, the main shaft 57 of which is screw-threaded to receive a travelling nut 58 guided by rods 59 and 60 so that when the shaft 57 is rotating the nut 58 travels longitudinally of the shaft. The time piece also has secured to the shaft 57 a drum 61 carrying a chart 62. A stylus 63 carried on an arm 64 secured to the nut 58 and actuated by an electro-magnet 65 is provided for the purpose of plotting a curve on the chart 62 to show the output of the mill for any desired period of time. The nut 58, it will be observed from Fig. 10, comprises two members 66 and 67. the member 67 being pivoted on 66 at 68. This construction is provided so that the stylus may be reset after the nut 58 has moved to the limit of its travel to the right as viewed in Fig. 9. Current for the magnets 42, 48 and 65 and for the winding 32- of the clutch 22 is supplied from a battery 69 or other suitable source of power supply.

A switch and controlling mechanism therefor is shown at the left of Fig. 4 and comprises a plunger 70 adapted to be reciprocated in a cylinder 71, the plunger resting upon the top of the upper roll 1 of the mill and being maintained in engagement therewith by a coil spring 7 2 within the cans ing 71 just mentioned. A short rod 73 is carried by the upper end of this plunger, this rod engaging one arm of a bell crank lever 74 mounted within a casing 7 5 immediately above the casing 71. The arm of this bell crank lever is maintained in colistant engagement with the upper end of the rod 73 by a small spring 76. Connected to this bell crank lever 74 is a system of levers 77, 78 and 79, the lever 79 constituting a movable contact, this lever being pivoted at 80 and movable about said pivot into engagement with a fixed contact 81.

t will be seen from Fig. 4 that when the mill A is idling the contact 79 will be out of engagement with the fixed contact 81 but as soon as a strip is fed to the mill, the roll l'will be raised slightl carrying the plunger upwardly which, through the system of levers just mentioned, will cause the contact 79 to engage the contact 81.

Assuming now that the mill A is running idly, the shaft 11 will be driven due to rotation of the shaft 8, or the roll 2 of the mill, imparting rotation to the shaft 25 of the indicating element 16 through the gears 8, 10, 14, 18, 23 and 24. This rotation of the shaft 25 will cause the indicating element to function and to register the peripheral travel of the mill roll 2. At this time, however, by reason of the fact that the winding 32 of the clutch 22 is not energized, the indicating element 17 will not be functioning. The rotation of the shaft 25 also imparts rotation to the commutator 27 carried thereby to make and break a circuit at the contacts 28 and 29.

From Fig. 11 which is a complete wiring diagram of the electrical system of our device, it will be seen that a circuit tothe magnet 42 controlling the operation of the indicator 40 of Fig. 7 will be made and broken periodically by reason of the fact that the commutator 27 is provided with regularly spaced insulation blocks 82. The circuit for the magnet 42 may be traced as follows:

From the battery 69 by way of conductor 83, contact 28, commutator 27, contact 29, conductor 84, winding of the magnet 42, conductors 85, 86 and 87 to the other terminal of the battery.

The magnet 42 now being energized will draw in its core 43 to impart an impulse through its connection with the pawl 46 to the ratchet-wheel 47 to actuate the indicator 40. By reason of the fact that the commutator 47 is rotating the circuit just traced will be regularly made and broken so that the magnet 42 will be energized and de-energized in regular order to impart a series of impulses to the ratchet-wheel 47. Thecommutator 27, the pawl 46 and ratchetwheel 47 are so designed with relation to the indicating element 16 that the two indicators 16 and 40 will always register the same. This action will continue while the mill A is running without regard to whether or not a strip 5 is passing therethrough.

If a strip 5 of metal be fed to the rolling mill, this will cause the upper roll 1 thereof to be raised slightly to cause the contact 79 to engage the stationary contact 81. This closes a circuit to the winding 32 of the clutch 22. This circuit may be traced from one terminal of the battery 69, conductor 88, contacts 81 and 79, conductor 89,*contact 35,

collector ring 33, winding 32, collector ring 34, contact 36, conductors 90 and 87 to the other terminal of the battery. The winding 32 of the magnetic clutch now being energized, the member 30 thereof will move longitudinally of the shaft 31 into engagement with the member 21 of the clutch and the indicating device 17 will now be driven by way of the gears 9, 10,14, 18 and clutch 22. The shaft 31 now rotating will drive the commutator 37 and thiscommutator will make and break in regular order a circuit to the windings of the magnet 48. This circuit may be traced as follows:

From one terminal of the battery 69 by way of conductor 88, contacts 81 and 79, conductors 89 and 91, contact 39, commutator 37, contact 38, conductor 92, winding of the magnet 48, conductors 93, 94, 86, and 87 to the other terminal of the battery. The winding of the magnet 48 being energized will cause the magnet to actuate its core 49 to in turn impart a partial rotation to the ratchet-wheel 52 of the indicating device 41 and by reason of the insulation segments 95 with which the commutator 37 is provided, the circuit of the winding of the magnet 48 will be made and broken at regular intervals to cause the ratchet-wheel 52 to be rotated to actuate the indicating device 41. The commutator 37 is so proportioned relatively to the speed at which the indicator 17 is driven as to cause the indicating devices 41 and 17 to register the same at all times. At this time, regardless of whether or not there be a load on the mill, the time piece 56 is functioning to cause the drum 61 to be driven thereby and the nut 58 to be carried rearwardly, relatively to the shaft 57 of Fig. 9. If no load be on the mill at this time the stylus 63 will not be functioning. Assuming, however, that a load is on the mill, that is to say assuming that a strip 5 is passing through the mill, the contacts 81 and 79 will be closed as already pointed out and a circuit may therefore be traced to the winding of the magnet 65 as follows:

From one terminal of the battery 69 by way of conductor 88, contacts 81 and 79, conductors 89, 91 and 96, winding of the magnet 65, conductors 97, 94, 86 and 87 to the other terminal of the battery.

The winding of the magnet 65 being energized will draw the stylus 63 into engagement with the chart 62 which at this time is rotating, being driven by the time piece 56, and inasmuch as the nut 58 is travelling rearwardly and the chart 62 is being rotated, the stylus 63 will plot or draw a curve on the chart, the shape of which will depend upon the length of time it takes for the strip 5 to pass through the mill.

It will be seen from the foregoing that we have provided indicating devices capable of being used with a mill to register or indicate the travel of a moving part of the mill and also a device whereby the amount of material passed through the mill may be registered. Both of these factors are visible at the mill itself and also at a remote point, such as the ollice of the manager or superintendent of a plant.

It. will be seen also thatwe have provided means whereby a permanent record may be obtained of the operation of the mill. this means being comprised by the chart 2 and the stylus (33, the operation of which has already been fully described.

It will be seen also that we have provided indicating devices of the character just referred to wherein the indicating device or devices registering the travel of a moving part of the mill is driven from the mill itself, that is to say one indicating device, the one at the mill, is driven directly from the mill roll while the corresponding indicating element is driven electrically. the electrical drive of the last indicating element being controlled by the mill.

It will be further observed that the indicating elements by which the amount of material passed through the mill is registered is driven from the mill through the medium of an electric clutch, the energization of which is controlled by one of the mill rolls while the corresponding indicating clement remote from the mill is controlled by its corresponding indicator.

\Vhile we have illustrated herein and described an embodiment of our invention, it is to be understood that we are not to be limited to the details of construction so illustrated and described but that obviously changes may be made therein within the purview of this invention.

This application is a division of our copending application Serial No. 415,513, filed October 8. 1920.

'hat is claimed as new is:

1. In mechanism of the class described, the combination of a. rotatable drum, a drive shaft carrying said drum, a chart on said drum and rotatable therewith, a stylus 00- operating with said chart. a nut on said drive shaft comprising two members pivotally attached to ea h ()E-lltl held against rotation on said shaft and adapted to travel longitudinally thereof as the shaft is rotated, a connection between said nut and stylus whereby the stylus is caused to travel with said nut transversely of said chart and an electromagnet mounted on the connection between said stylus and nut for bringing the stylus into operative relation with respect to said chart.

2. In combination, a mill, a rotatable drum, a threaded shaft on which said drum is mounted and rotatable with said drum, a chart carried by said drum and rotatable therewith, a nut on said threaded shaft comprising two members pivotally attached to each other, means for preventing rotation of said nut on said shaft while permitting movement of the nut longitudinally of the shaft, one of said pivoted members constituting said nut extended to form an arm, a stylus pivotally mounted on said extended portion and an electromagnet carried by said extension for bringing said stylus into operative relation with respect to said chart, said electromagnet being controlled by said mill. causing the stylus to record upon the chart the amount of material passed through the mill.

3. In combination, a mill, a time-piece, a drum driven by said time-piece, a threaded shaft driven by said drum and rotatable therewith, a nut on said shaft comprising two members pivotally connected to each other, one of said members being extended to form an arm, guide rods for said nut one. rod passing through said arm, said guide rods preventing rotation of said nut on said threaded shaft, an electromagnet carried by said arm and controlled by said mill, a chart on the periphery of said drum, a stylus yieldingly connected to said arm and adapted to be brought by said electromagnet into operative relation with respect to said chart whereby as the chart is rotated by said drum the stylus will record on said chart the amount of material passed through said mill. the stylus while being held by said eleetromagnet in engagement with the surface of said chart travelling transversely of the chart.

This specification signed this 20th day of December, 1921.

AUGUST SUNDH. This specification signed this 5th day of Dec., 1921.

WILLIAM WESTERMAN. 

